Feed mechanism for band resawing-machines



F. MCDONOUGH. FEED MECHANISM FOR BAND RESAWING MACHINES.

(Application filed Feb. 1, 1898.) (No Model.) 2 Sheets-Shem I.

No. 608,894. Patented Aug. 9, I898.

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No. 608,894. Patented Aug. 9, I898.

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FEED MECHANISM FOR BAND BESAWING MACHINES.

(Application filed Feb. 1, 1398-) (N o M 0 d e I 2 Shaets8heet 2.

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FRANK MODONOUGH, OF EAU CLAIRE, WISCONSIN.

FEED MECHANISM FOR BAND RESAWING MAGHINE3.

SPECIFICATION forming part of Letters Patent No. 608,89, dated August 9, 1898. Application filed February 1, 1898. Serial No. 668,696. (No model.)

United States Letters Patent, No. 589,014,

dated August 14, 1897. l

The object of the present invention is to provide means for adjusting the base, workcarriage, and feed-rolls mounted on said work: carriage to one side of and out of line with the band-saw for the purpose of enabling the feed-rolls to be moved to variable positions for guiding timber to the saw, so that boards of different thicknesses may be cut as required.

A further object that I .have in view is to provide simple means .by which the carriage and all the various parts of the feed mechanismmay be adjusted without interfering with the proper operation or adjustment of said feed mechanism, and, further, to hold the work-carriage and feed mechanism securely in their adjusted positions. lVith these ends in view my invention con: sists in the combination, with a base, a workcarriage mounted on said base, and a feed mechanism supported by said work-carriage, of a subbase fixed below the base and having the latter mounted thereon for adjustment in a plane substantially at right angles to the line of feed of the work through the feed mechanism and means mounted on the subbase andoperatively connected with the base which sustains the feed mechanism to adjust said base and the feed mechanism to variable positions with relation to the saw-line.

The invention further consists in the novel combination of elements and in the construction and arrangement of parts, which will be hereinafter fully described and claimed.

To enable others to understand my invention, I have illustrated the preferred embodiment thereofiin the accompanyingdrawings,

mechanism forthe base.

forming a part of this specification, and in which Figure 1 is a plan View of part of a sawmill, illustrating a feed mechanism and means for adjusting said feed mechanism across the saw-line in accordance with myimprovement. Fig. 2 is an elevation looking at the front or receiving endof the feed mechanism and showing thebase of the work-carriage sup ported on the subbase and connected with the adj usting-lever in accordance with my improvement, Fig. 3 is a detail plan view of the base and subbase with the adjusting Fig. l is a side elevation of the parts represented by Fig. 3. Fig. 5 is an end elevation, partly in section, of the parts represented by Figs. 3 and 4. Fig. 6 is an enlarged detail view in side elevation, partly in section, of one of the adjustable holding-dogs, Fig. 7 is an end view of the adjustable holding-dog represented by Fig. 6. r 7

Like numerals of reference denote like and corresponding parts in each of the several figures of the drawings.

, In Figs. 1 and 2 of the accompanying drawings I have illustrated so much of the feed mechanism disclosed by my prior patent, to which reference has been made, as is necessaryfor an understanding of my present im-,

provements, the latter being represented more fully and in detail by Figs. 3 to 7, inclusive, of the drawings.

1 will first proceed to describe, briefly, the necessary cooperating elements of the feed mechanism disclosed in my prior patent and subsequently describe the improvements which are employed in connection with the feed mechanism.

Referring now more particularly to Figs. 1 and 2, 1 designates a base on which is mounted the work-carriage 2 for movement toward and from the saw. This Work-carriage is provided With the transverse tubu lar supports 3 3, and to the front support 3 is attached the tables 4 t", whileto the rear support 3 is secured the tables 5 6. j The work-carriage also sustains the timber rest 7, and to said carriage is connected the longitudinally-disposed adjusting-screw 8, which is mounted in a suitable bearing 011 the base 1 and is connected with a traveling nut (not shown) which iscarried by the under side of the work-carriage 2. The front work-tables 3 3 have erected thereon the brackets 9, and on the rear work-tables 5 6 are the brackets 10. The brackets 9 on the front work-tables sustain the front set of feed-rolls 11, which are mounted in the brackets and on the tables substantially in the manner disclosed by my prior patent and which are designed to be driven positively by the power connections illustrated in said patent. The brackets 10 on the rear work-tables 5 6 sustain the rear set of feed-rolls 12 and the intermediate set of feed-rolls 13. The brackets 10 are common to the rear and intermediate sets of feed-rolls, and the intermediate feed-rolls are geared to the rear set of feed-rolls, which are positively driven by power connect-ions, substantially as disclosed by my aforesaid patent. The front,

. intermediate, and rear sets of feed-rolls are arranged in line with each other and with the saw 1 1, the latter traveling in a suitable guide 15 and projecting into a slot 16 of the timberrest 7. As before indicated, the feed-rolls are mounted in the adjustable bearings, substantially as disclosed by my prior patent, for the purpose of tilting or eanting the feedrolls to the desired angular vertical positions proper for the feed of the timber through the machine to the saw, and the entire feed mechanism is mounted on the work-carriage 2 for the adjustment by the longitudinal screw 8 toward and from the saw 14:. No novelty for any of these parts is claimed in this application, and, as before indicated, said elements or parts are shown and described herein in order that others skilled in the art may better understand the operation and advantages of my present improvement.

According to my invention I provide mechanism for adjusting the base 1 and the entire feed mechanism in a line transversely across the saw-line of the mill or machine, and this mechanism is adapted to lock the feed mechanism at variable positions with relation to the saw, and thus enable boards of different thicknesses to be cut from the timber supplied by the feed-rolls and the timber-rest to the saw.

I employ a subbase 17, upon which the base 1 is mounted for sliding movement or adjustment transversely across the plane of the saw 14, and as this base 1 carries the entire feed mechanism it will be seen that the feed mechanism moves with the base in its adjustment relatively to the saw-line, so that the feedrolls may be caused to assume a position out of line with the saw. The subbase shown in the accompanying drawings consists of a substantially flat structure which is provided outside of the line of the guides to which the base 1 is connected with the bosses 19, through which are passed the securing-bolts 18, that serve to solidly and rigidly fasten the subbase in position on the floor or foundation of the mill. This subbase is provided, as clearly shown by Fig. 1, with the longitudinal guideways 20, and the base 1 has the depending feet 21, which engage with the guideways 20, and thus slidably connect the base to the subbase. I prefer to employ dovetailed guideways and feet on the subbase and base, respectively, to insure accuracy in the adj ustment of the base on the subbase; but the detailed form or construction of these guides may be varied by a skilled mechanic without departing from the principle of the invention.

At one corner or angle of the subbase I erect an are or segment 22, which is preferably made separate from the subbase and is rigidly bolted thereto, as represented by Figs.

3 and 4. At its upper end this are or segment is formed with a longitudinal segmental slot 22, adapted to receive a series of holding-dogs, with which are adapted to engage a locking-bolt on an adjusting-lever, as will presently appear.

A rock-shaft 23 is arranged horizontally on the subbase outside of the base 1 and the line of adjustment thereof, one end of this rockshaft being journaled in a fixed lug 2 1 on the subbase and the other end of said shaft being journaled in a boss, which constitutes a bearing 25 on the are or segment 22, as shown by Fig. 1. To one end of this rock-shaft is rigidly secured in any suitable way the adjusting lever 26, which extends upwardly from the subbase alongside of the adjustable base 1, and said lever 20 is provided on one side thereof with the spaced guides 27, on which is slidably fitted a locking-bolt 28. On the upper end of this adjusting-lever 26 is pivoted a hand-operated controlling-piece 29, to which is connected one end of a link ,30, the lower end of said link being pivoted to the locking -bolt 28, as shown by Fig. 5. The locking-bolt 28 is adapted to engage, according to the position of the lever 26, with one or the other of a series of holding-dogs 31, which are fitted in the slot 22 of the are or segment 22 and are adjustable therein as desired. Each holding-dog 31 is constructed substantially as shown by Figs. 6 and 7 of the drawings-that is to say, the holding-dog has its shank provided at one end with the enlarged angular head 32, in which is produced a slot or recess 33, and one end of the dog-shank is externally threaded to receive a clamping-nut 34:. The holdingdog is applied to the are or segment by thrusting the shank through the slot in the are or segment sufficiently far to bring its enlarged head 32 against one side of the segment and in the vertical plane of the locking-bolt 28,

and to the threaded extremity of said shank is screwed the nut 34, which clamps the holding-dog securely in its adjusted position on the are or segment. It is evident from the foregoing description that the holding-dogs may be readily applied to the are or segment; that any desired number of holding-dogs may be provided according to the adjustment which it is desired to impart by the lever to ceases the base 1 and the feed mechanism carried thereby, and that the series of holding dogs may be adjusted to different positions in the slotted are or segment for the purpose of adj usting the feed mechanism to variable positions with relation to the saw-line and adapting the feed mechanism to so direct the timber to the saw as to cut boards of different thicknesses from the timber or log.

The roclcshaft is provided at its end opposite to the adjusting-lever 26 with a crankarm 35, rigidly secured to said rock-shaft, and to this crank'arm is pivotally connected, as at 37, one end of a link 86, which extends into the base 1 and is pivotally attached to the latter, as at 38. (See Figs. 3 and 5.)

With the lever 26 adjusted to the positions indicated by Figs. 2 and 5 the base and the feed mechanism carried thereby occupy posi-' tions where the several sets of feed-rolls are in line with the saw let; but it will be evident that the lever may be adjusted to engage with either of the other holding-dogs of the series clamped on the are or segment 22. The movement of the adjusting-lever rocks the shaft 23 in its bearings on the subbase and the segment, and this movement of saidrockshaft causes the link 36 to move the base 1 in the proper direction for adjusting the sets of feed-rolls to one side and out of line with the saw 14. The extent of adjustment of the base and the feed mechanism varies according to the movement of the lever and its engagement with the holding-dogs, and this adjustment of the feed mechanism is determined by the width of the board Which it is desired to cut from the timber or log.

From the foregoing description it will be seen that I have provided an adjusting mechanism for use in connection with the base and the feed mechanism carried thereby to enable the operator to control and vary the width or thickness of the board which may be cut by the saw, and this adjustment of the feed mechanism does not in any way interfere with the proper operation of the various working parts of said feed mechanism or theadj ustment of the individual elements of said feed mechanism in the manner disclosed by my prior patent. My improvement enables boards of different sizes, say from one inch up to three or more inches, to be cut from the timber or log, and the adjustment of the feed mechanism is readily effected or controlled by a lever arranged within convenient reach of the attendant or operator. In case of necessity the adjusting-screw 8 may be rotated to retract the carriage and the rear set of feed-rolls out of the path of the saw-guide 15, and this adjustment of the carriage does not interfere with or affect the adjustment of the base, which adjustment of the base is controlled by the lever 26. For example, other means than the cross rock shaft and the lever may be used for adj usting the base on the subbase. Thus araek may be provided 011 the base to mesh with a pinion on an operating-shaft journaled on the base, such rack-and-pinion adjusting mechanism being the equivalent of the rock-shaft and-link connection between the base and subbase.

I am aware that changes in the form and proportion of parts and in the details of construction may be made by a skilled mechanic without departing from the spirit or sacrificing the advantages of my invention, and I therefore reserve the right to make such modiiications as clearly fall within the scope of the invention.

lVhat I claim is 1. In a feed mechanism for band resawingmachines, the combination with a saw, and a carrier-base having a timber-rest and a feed mechanism mounted thereon, of a flat horizontal subbase arranged wholly below the carrier-base to avoid interfering with the adjustment of said carrier-base and the operating devices thereon, means for slidably connecting the carrier-base to the subbase for movement of the former and all its devices in a plane at right angles to the saw-line, and manually-operative adjusting devices mounted on the subbase and operatively connected to the carrier-base for moving the latter and the devices thereon to variable positions in relation to the plane of the saw, substantially as described.

2. In a feed mechanism for band resawingmachines, the combination with a saw, of a flat stationary subbase, an adjustable base slidably fitted to said subbase for movement in a plane at right angles to the saw-line and having a timber-rest, work-carriage and feed mechanism mounted thereon on a horizontal plane above the subbase for adjustment and service without hindrance from said subbase, a rock-shaft j ournaled on the subbase at one side of the path of the carrier-base and said shaft operatively connected to said carrierbase to adjust the latter and its devices to variable positions relatively to the saw, and means for holding the rock-shaft and carrierbase, with all the devices on the latter, firmly in their adjusted positions, substantially as described.

3. In a feed mechanism for band resawingmachines, the combination with a saw, and a carrier-base which supports a timber-rest, work-carriage and a feed mechanism in a horizontal plane for presentation in operative relation to the saw, of a stationary fiat subbase lying below the carrier-base and the devices thereon and having said carrier-base slidably fitted to'said subbase for movement in a plane at right angles to the saw, a rock-shaft jour naled on said subbase at one side of the ad justable carrier-base and linked thereto for adjusting the carrier-base and its devices to variable positions relatively to the saw, an

adjusting-lever attached to said rock-shaft,

and locking devices supported on the subbase out of the path of the carrier-base and coacting with the lever to hold the latter, the rockshaft, and the carrier-base firmly in place, substantially as described;

4. In a feed mechanism for band resawingmachines, the flat subbase having gnideways arranged at right angles to the plane of a saw, a rock-shaft journaled on said base, a segment fixed to the base and forming one of the journals for the rook-shaft, a series of adj ustable dogs mounted in said segment, and a lever attached to the rock-shaft and having means for engaging with said dogs, in combination with a saw, and a carrier-base slidably fitted to the guideways of the subbase, linked to the rock-shaft, and supporting a timber-rest, Work-carriage and feed mechanism, all of which are mounted upon the carrier-base above the plane of the subbase and are operative Without hindrance from the adjusting devices for the carrier-base, substantially as described.

5. In a feed mechanism for band resawingmachines, a flat stationary subbase having guideways arranged at right angles to the plane of a saw, an upright holding-segment fixed to said subhase and provided with a segmental slot, the holding-stems clamped adjustably in the slotted segment and provided With the notched heads, a rock-shaft journaled on the base and in the segment, and a lever fixed to the rock-shaft in close relation to the segment and having a detent for engaging With the recessed headed stems, in combination with a saw, and a carrier-base slidably fitted to the subbase and supporting a timber-rest and a feed mechanism in a horizontal plane above the subbase, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two Witnesses.

FRANK McDONOUGI-I. Witnesses:

EMMET IIoRAN, B. HOGAN. 

